From dbf391f99a8def88dbc94f362546b64ac90d0234 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Mon, 12 Mar 2018 14:19:35 +0100
Subject: NanoHTTPD: Fix infinite loop

---
 src/main/java/fi/iki/elonen/NanoHTTPD.java | 43 +++++++++++++-----------------
 1 file changed, 19 insertions(+), 24 deletions(-)

(limited to 'src')

diff --git a/src/main/java/fi/iki/elonen/NanoHTTPD.java b/src/main/java/fi/iki/elonen/NanoHTTPD.java
index bb882ee..19508c7 100644
--- a/src/main/java/fi/iki/elonen/NanoHTTPD.java
+++ b/src/main/java/fi/iki/elonen/NanoHTTPD.java
@@ -169,7 +169,7 @@ public abstract class NanoHTTPD implements Runnable
 		setAsyncRunner( new DefaultAsyncRunner() );
 	}
 
-	protected static final void safeClose( Closeable closeable )
+	public static final void safeClose( Closeable closeable )
 	{
 		if ( closeable != null ) {
 			try {
@@ -218,7 +218,7 @@ public abstract class NanoHTTPD implements Runnable
 							// When the socket is closed by the client, we throw our own SocketException
 							// to break the  "keep alive" loop above.
 							if ( ! ( e instanceof SocketTimeoutException )
-									&& ! ( e instanceof SocketException && "NanoHttpd Shutdown".equals( e.getMessage() ) ) ) {
+									&& ! ( e instanceof SocketException ) ) {
 								e.printStackTrace();
 							}
 						} finally {
@@ -567,7 +567,7 @@ public abstract class NanoHTTPD implements Runnable
 		/**
 		 * Sends given response to the socket.
 		 */
-		protected void send( OutputStream outputStream )
+		protected void send( OutputStream outputStream ) throws IOException
 		{
 			String mime = mimeType;
 
@@ -602,25 +602,21 @@ public abstract class NanoHTTPD implements Runnable
 
 			sendConnectionHeaderIfNotAlreadyPresent( sb, header );
 
-			try {
-				if ( requestMethod != Method.HEAD && chunkedTransfer ) {
-					sendAsChunked( outputStream, sb );
-				} else {
-					int pending = data != null ? data.available() : 0;
-					pending = sendContentLengthHeaderIfNotAlreadyPresent( sb, header, pending );
-					sb.append( "\r\n" );
-					outputStream.write( sb.toString().getBytes( StandardCharsets.UTF_8 ) );
-					sb.setLength( 0 );
-					sendAsFixedLength( outputStream, pending );
-				}
+			if ( requestMethod != Method.HEAD && chunkedTransfer ) {
+				sendAsChunked( outputStream, sb );
+			} else {
+				int pending = data != null ? data.available() : 0;
+				pending = sendContentLengthHeaderIfNotAlreadyPresent( sb, header, pending );
+				sb.append( "\r\n" );
+				outputStream.write( sb.toString().getBytes( StandardCharsets.UTF_8 ) );
+				sb.setLength( 0 );
+				sendAsFixedLength( outputStream, pending );
+			}
 
-				if ( sb.length() != 0 ) {
-					outputStream.write( sb.toString().getBytes( StandardCharsets.UTF_8 ) );
-				}
-				safeClose( data );
-			} catch ( IOException ioe ) {
-				// Couldn't write? No can do.
+			if ( sb.length() != 0 ) {
+				outputStream.write( sb.toString().getBytes( StandardCharsets.UTF_8 ) );
 			}
+			safeClose( data );
 		}
 
 		protected int sendContentLengthHeaderIfNotAlreadyPresent( StringBuilder sb,
@@ -893,14 +889,10 @@ public abstract class NanoHTTPD implements Runnable
 					try {
 						read = inputStream.read( buf, 0, BUFSIZE );
 					} catch ( Exception e ) {
-						safeClose( inputStream );
-						safeClose( outputStream );
 						throw e;
 					}
 					if ( read == -1 ) {
 						// socket was been closed
-						safeClose( inputStream );
-						safeClose( outputStream );
 						throw new SocketException( "NanoHttpd Shutdown" );
 					}
 					while ( read > 0 ) {
@@ -912,6 +904,9 @@ public abstract class NanoHTTPD implements Runnable
 						if ( maxRequestSize != 0 && rlen > maxRequestSize )
 							throw new SocketException( "Request too large" );
 					}
+					if ( splitbyte == 0 ) {
+						throw new SocketException( "Connection was closed" );
+					}
 				}
 
 				if ( splitbyte < rlen ) {
-- 
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